Street cable railway



U ITED STATES PATENT OFFICE.

JOHN D. ISAACS, OF OAKLAND, CALIFORNIA.

STREET CABLE RAILWAY.

EPECIFICATION forming part of Letters Patent No. 326,120, datedSeptember 15, 1885.

Application filed October 30. 1884. (No model.)

To all whom it may concern:

Beit known that I, JOHN D. IsAAOs,of Oakland, Alameda county, State ofCalifornia, have invented a certain Improvement in Cable Railways, ofwhich the following is aspecification.

This invent-ion relates to underground tubes for cable railways; andmore particularly it relates to the setting and construction of thesupporting-brackets which carry the boxes of the rope'carrying pulleys.

The invention consists in a peculiarity in the form of the brackets andthe means employed to secure them firmly in position.

In the accompanying drawings, forming. part of this specification, Ishow two views, that in Figure 1 being a transverse sectional elevationof a tube at just where a'carryingpulley occurs, Fig. 2 being a plan ofthe pulley and its bracket as it will set with relation to thesurrounding concrete.

In both figures the same letters of reference refer to like parts.

Heretofore tubes for cable railways, when made of concrete, have beenprovided with iron yokes or frames to which the remaining iron-work ofthe tube has generally been directly or indirectly connected, so thatthis iron-work has been in most casesentirely relied upon to support theboxes of the carrying-pulleys, the concrete being used simply to formthe tube and foundation for paving,.

&c. In the present construction the concrete itself is relied upon toact as anchorage and support for the pulley-brackets, the yokesheretofore used being dispensed with.

In the drawings, A is the mass of concrete forming the tube, which inmost cases will extend on either side to make a foundation for the railsB.

C is the slot for the grip shank.

D is my pulleybracket, made, as shown in Fig. 2, to surround the pulleyE in plan. At d d this bracket will have recesses to hold the boxes F,which carry the journals of the pulley-spindles G.

H H are the bolts holding the bracket firmly anchored to the concrete.

The bracket has supportingflanges on either side which rest in themolded recesses I I.

The anchorbolts are built in the concrete when the tube is formed,and,while they serve to more securely fasten the bracket in place, theymay in some cases be dispensed with,and the bracket, if madesufficiently heavy and well fitted in the recesses I I, will be foundquite secure from movement.

This form of support for the boxes of the carrying-pulley spindles issolid and firm, easily removed and replacedwithout interfering with theoperation of the road, and is cheap and simple to construct and put intooperation.

What I claim as my invention, and desire to secure by Letters Patent, isas follows:'

In combination with a concrete tube for underground cable railways, theframe or bracket D, made in plan to surround the carrying-pulley,andsupporting on each side the boxes for the pulley-spindle, and havingprojections resting in recesses molded in opposite sides of the tube, sothat the bracket will be firmly held in place, and a clear drainage waybeleft' on bottom of the tube, substantially as and for-the purposeherein described.

JOHN D. ISAACS.

